Lock-nut.



Nc. 675,664. 4Patented lune 4, l90l. U. C. MUSDHE.

L U C K N U T.

cation filed Oct. 12

(No ModeL.)

1 nsiimmunum w UNITED STATES PATENT OFFICE.

ONE-HALF TO LOCK-NUT.

SPEGXEIGATION forming part of Letters Patent No. 675,664, dated .T une4, 1901. Application tiled October l2, 1900. Serial No. 32,805. (Nomodell) To @ZZ whom it 71mg/ concern:

Be it known that I, OTHO O. MOORE, a citizen of the United States,residing at Norfolk, in the county of Norfolk and State of Virginia,have invented new and useful Improvements in Lock-Nuts, of which thefollowing is a specification.

My invention has for its object to produce a lock-nut having certainimproved features of construction and mode of operation to behereinafter pointed out, and which is illustrated in the drawings, suchlock-nut being adapted for use under a great variety of circumstances ina great many positions, among which may he mentioned locking the nutsupon the bolts ot' cylinder-heads and the securing of the nuts upon theends of vehicleaxles.

For the sake of a better understanding of my invention I haveillustrated one embodiment thereof in the accompanying drawings; but Ihave not attempted to illustrate all the different embodiments thereof,as they would he largely matters of mechanical detail, depending uponthe particular use to which the invention is put, the purpose of thedrawings being to illustrate the principle of the inventionwithoutlimiting it to details of construction incident to specicembodiments thereof.

In the said drawings, Figure lis a sectional elevation of a lock-nutembodying my improvements. Fig. 2 is a top plan View of the same. Fig. 3is a detail plan View of the lockingwasher- Fig. e is a cross-sectionalview of the washer, taken on the line l et of Fig. 3; and Fig. 5 is avertical section of another form of my invention.

In the drawings, A represents a bolt or machine-screw. It is formed witha channel or groove a, which extends to a greater or less extentlongitudinally of the screw-threaded part of the bolt.

B represents the nut, which is threaded to engage with the bolt. Itis ofa greater thickness than are the nuts ordinarily in use, and its outerportion is chambered concentric with its screw-threaded portion, as atl). An annular key, washer, or locking-plate C is arranged within thechambered portion of the nut B, and a nut or plug D is arranged Atoforce the washer O into engagement with the bolt, and thereby preventthe accidental turning of the nut B upon its screw. The key orlocking-washer O is dished, as represented inthe drawings, and isprovided with an inward-extending lug or tongue c, the end of which isadapted to rest within the groove or channel a. The washer O is of suchsize that its outer edge rests against the shoulder formed at the bottomof the chamber?) in the nut I3, and the hole through the washer is ofsuch size that the inner edge of the washer when it is put in place justescapes the periphery or screw-threaded portion of the bolt.

The nut or plug D, which operates upon the washer or lockingkey O,preferably engages with the nut B by means of screwthreads e, out,respectively, in an inner wall of the chambered portion l) of the nut Band on the outer face of a reduced portion of the nut or plug D. Thepitch of the screwthreads e I prefer should be less than the pitch ofthe threads upon the bolt or screw A. This nut D has a centrallongitudinal apere ture CZ of a size to permit it to pass freely overthe screw-threaded portion of the bolt without engaging therewith.

In order to lock the nut B, it is first set tightly against the objectwhich it is to confine. The washer O is then inserted into the outerchambered end of the nut, its tongue c resting in the groove ct of thebolt and sliding freely therein, and the nut or plug D is screwed intothe recess B in the bolt until its end comes into engagement with theupper surface of the washer. If now the nut or plug D be screwed fartherinto the nut B, the washer will he flattened out, forcing the tongueinto engagement with the bolt and bending it. The friction which isincident to this operation will be sufficient to prevent the nut B fromworking loose under the oi'- dinary jars and strains to which it issubjected, and if it is desired at any time to remove the nut the nut orplug D may be loosened, allowing the washer to resume its normal shape,when the nut B may be easily turned. If the plug be driven against thewasher with great force, the latter will be flattened out, so that itsinner edge will engage wit-h the screw-thread, and the size of thecentral opening through the washer may IOO ` locking plate or washerwhich is made without the lug or tongue c; but ordinarily I prefer toconstruct the parts as shown.

In Fig. 5 I have shown a somewhat different form of my invention. Inthis view, A represents the bolt; B', the nut; C', the locking washer orkey, and Dl the nut or plug which forces the washer into lockingengagement with the'nut and bolt. The bolt B' is chambered andscrew-threaded to receive the reduced Screw-threaded portion of the nutor plugD. The washer or locking-key C is of annular cup or dish shapeand instead of restingu-pon the bottom of the chamber in the nut B' issupported upon a shoulder 2, formedy near the end of the bolt. The boltis provided with an extension 3 beyond the shoulder 2 of reduced size,and this is formed with a longitudinall groove c2 to receive a tonguecarried by the key or washer C'. Af-

ter the nut B has been screwed into place the washer C is placed overthe stem 3 of the bolt and-occupies a position within the chamber ofthenut, its outer edge just escaping engagementtherewith. If now the plugor nut D hescrewed into the chamber of the nut B until itv engages withthe Washer or locking annular key, it will' force the latter outwardintoY engagement with the n-ut and effect a locking action between. thebolt and nut.

Itwill be understood that a split. key or washer-instead of an annularundivided key or washer, as I have shown in the drawings, might'be usedin eachform of my invention. I prefer, however, the form sho\vn,that.is,an undivided annular cup or dish shaped locking-washer. A

Having described my invention, what I claim,and desire to secure byLetters Patent,

1ST-f .1. T hecombination with a screw-threaded boltand a nut whichengages therewith, of a lockingY key or washer, and means carried bythenut for forcing the washer into lockn g engagement with they bolt andthe nut, substantially as set forth.

1- 2. The combination with a screwthreaded boltof1a nut engagingtherewith and provided'with a chamber which is substantially concentricwith the threaded aperture in the nut,.a locking key or Washer arrangedto be seated in the said chamber, and means for forcing the key orwasher into engagement with both the nut and the bolt, substantially asset forth.

bolt, of a nut adapted to engage therewith, and formed with a chambcredportion substantially concentric with the threaded aperture therein, akey or locking-washer adapted to be placed within the cha'mber of thenut, and a nut or plug having screw-threaded engagement with thefirst-mentioned nut and adapted to engage with the said locking key orwasher, and force it into engagement with the nut and bolt,substantially as set forth.

4. The combination with a screw-threaded bolt of a chambered nut, anannular dishshaped locking key or washer adapted to be inserted withinthe chamber of the nut, and means for bearing upon the said washer andforcing it into engagement with the nut and bolt; substantially as setforth.

5. The combi-nation with a screw-threaded bolt, of a nut B adapted toengagetherewith formed with the chamber bin one-end, alocking key orwasher of annular shape adapted to be inserted in the bottomof the saidchamber, and a plug or nut D havingscrew-threaded engagement with thenut B, and arranged to be forced into engagement with the said key orwasher, the plug or nut Dbeing formed with a central aperture whereby itis adapted to pass over the screw-threaded portion of the bolt wit-houtengaging therewith, substantially as set forth.

(S. The combination of a screw-threadedbolt formed with a longitudinalchannel or groove at, a nut B arranged to engage with-the bolt andformed with a chamber l) in one end, which is screw-threaded as at e, anannular washer or locking-key C adapted to fit into the lower end of thesaid chamber, and pro vided with a tongue c arranged to tit into thegroove a in the bolt, and av nut or plug D arranged to be screwed intothe chambered end of the nut B and to bear upon the washer orlocking-key and forcing it against the bolt and the nut B, substantiallyas set forth.

OTIIO C. MOORE'.

Vitnesses:

GEO. T. MAY, Jr., C. E. MEnRIAM.'

3. The combination with a screw-threaded IOD

